/Engine/Source/Editor/UMGEditor/Public/DesignerExtension.h
FDesignerSurfaceElement ( [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SWidget](API\Runtime\SlateCore\Widgets\SWidget) > InWidget, EExtensionLayoutLocation InLocation, [TAttribute](API\Runtime\Core\Misc\TAttribute)< FVector2D > InOffset, [TAttribute](API\Runtime\Core\Misc\TAttribute)< FVector2D > InAlignment )